Mechanism for reversing motive devices for operating doors and the like



1 Y R. D. CONKLIN 1,828,860 IBCHANISH FOR REVERSING MOTIVE DEVICES FOR OPERATING DOORS AND THE LIKE Filed June 7, 1929 INVENTOR ea can Kh'n Patented Oct. 27, 1931 1 UNITED; STATES PATENT OFFI ROSCOE n. conxr .m, or RAHWAY, NEwJERsEY, ASSIGNOR To NATIONAL rnnum'rlc co vrranx; or NEW YORK, N. Y., aconrom'rron or WEST VIRGINIA MECHANISM FOR nnvnasme norm nnvrcns non OPERATING Dooas AND THE 1.1112

A i Application filed June 7, 1929. Serial No. 369,205.

This invention relates in general .to rapparatus for use in conjunction with motive devices for operating doors, gates and the like by means ofwhich the motivedevices and the -doors are reversed in direction of movement when they strike. an object in their ath. I I One'of the objects of this invention is the provision of relatively simple mechanism of the above nature for 'use'in connection with movable doors and their operating mechanism which is simple and rugged 1n construction and adapted to easy and rapid manufactureand easy repair and replacement.

" A further object of this invention is the provision of reversing mechanism for use in connection with all types of door operating.

motors, .such' as the pneumatic and electrical object ofthe invention is the pes. Afurther a switch cooperating'with the provision. of

connecting mechanism between the motive device and the doorlwhich'is arranged to be "closed upon the door striking an'obstruction to eflfect a reversal in movement of the operating mechanism. 1 I

' These and other objects as w1ll appear from the following disclosure are successfully attained by means of this inventlon.

This invention resides substantially in1the combination, construction, arrangement and relative location of parts, all as willbe set forth in detail in the following specification. 1 Referrin to'the drawings which have been given in' an illustrative sense- Figure 1 is afslde" elevational new of one form of device for" accomplishing the purof reversing "doorsfg'ates and the like employs a flexible or collapsible shoe the moving" door which is deformed or colila'psedwhen the door strikes poses of this invention;

Fig.2 is a cross-sectional view taken on the line 2--2 of Fig. 1; i

Fig. 3 is a diagrammatic assoc atlon of the elements comprising this invention.

The most generally known and used form mechanism for power operated on the" forward edge of an object so as to close a switch or similar controlling device connected to the motive device for operating the door to effect a reversal in movement thereof. The present invention has to shown generally at 1, of the differentialtype.

At this point it might be emphasized that the principles of this invention are not restricted to the form of motive device,fwhetherit be pneumatrc or electric, and the disclosure in the. drawings is only given'to illustrate the principles of the invention. The pneumatic motorl is shown comprising a large and a small cylinder 2 and 3 and the piston rod 4 extending beyond the end of the smaller cylinder. The pneumatic motor 1 is mounted on a base plate 5 which inturn'is supported by a supporting plate 6 extending through a portion of the length thereof on each side, the

flanges 7 comprising a vertical and horizontal portion.- The flanges enclose the ed es'of the base plate 5 in a manner so that the ase plate and motor supported thereon may silde lon-' .gitudinally of the supporting plate 6 guided bv the'fianges '7. Supported on .one'end of the base plate5 is a bracket8 towhich is secured the vertical arm 9 and the horizontal pin 10. The free end of the pin 10 extends through the bracket-12 secured to the supporting late 6. The pin 10 is encircled by means 0 a heavy spring 11 which lies between the bracket 12 and the arm 9. Secured to the upper end of arm 9 is a pin 13 having a reduced portion 14.0n which is'slidably' mounted a contact discj17 supported between the insulating members 16 andby means of which the disc is insulated from the portion 14. A spring 15 is mounted between one insulating member 16 and av shoulder on pin 13. The'contact disc 17 and insulating member 16 are arranged to slidably move as a unit on the reduced portion l tagainst the action of thej spring 15. Supported ona bracket 19 is a; block of insulating material id pressure valve 83.

groundedns at 84.

v maintain the doors opened. switch SO'isopened magnet'valve 83'becomes 18 which in turn supports the fixed contacts 20 which are arranged to be bridged by the contact disc 17. The piston rod 4 is, of

course, intended to be connected by any suitable connecting link to the doors and the like to be operated by the motive device. The supporting plated is providedwith astop pin 22 against which the base plate 5.is forced by means oithe heavy spring 11 reacting on the 'hxed' bracket 12. he. pipe. 21 is provided "for supplying fluid pressure to the larger cylinder 2 of themotor 1'. The operation of the device will be described later in connection with Fig. 3.

The diagrammatic showing in Fig. 3 illustrates the association of the elements of t is invention. A wire 89 extends in the positive side the current source to the push button switch 80. One terminal of this switch. is connected by wires 81 and 82 to one terminal of the electro-magnetically operated This fluid pressure re is of a well known type extensively ed in this art and when energized operates to permit the admission of fluidpressure thvo oh the pipe 83- and pipe 21 into the i 1 cylinder ofthe motive device 1. The mina'l of the winding of this valve Wire 81 also connects to one contact 20 and the other contact 20 is connected to wire 85. At 86 isshown diagrammatically a switch adapted to be mounted in the path of thedoor so as to be .m'rved into the position shown in the'figure just as the door closes so that theconducting 87 thereonmoves out between the fixed contacts; one of which is connected to wire 85. he otherfixed contact is connected" by wire 88 to wire 89;

' For sake of clarity, although it is Well known in the art", it may bepoin-ted outthat the differential type of motor as shown here is alwayssuppl-ied" in the smaller cylinder with fluid pressure. When fluid pressure is supplied to the-larger cylinder the-force exerted in the smaller cylinder is overcome and the motor operates to open the doors. To supply this fluid pressure to the l'argercylinder the magnet valve 83' when energized conne'cts the larger cylinder tothe fluid pressure source through itself and the pipes 21 and 84. Thus to fully open the doors switch 80 must be held closed and kept closed in order to As soon as deenergized and permits the fluid pressure in the larger cylinder to eXha-ust-Etothe atmosphere through the valve. The forceexerted in the smaller cylinder then acts to close the doors. With this general discussionit is believed that theoperation-of thedevice, as now described, will-be more fully understood.

In the arrangement shown in Fig. 1 when fluid pressure is supplied to the larger'o'ylinder through the pipe 21 piston rod 4 begins cameo to move to the right and carries with it the door which is connected thereto. The strength of spring 11 is such that it is able to resist all the normal reactions caused by the operation of the door and hence the motor 1, which is slid ably supported on=thesupporting plate 6, does not-move; As soon, however, as the door strikes an obstruction the motor tending to move the door on, being unsuccessful will move to'thel'eft in Fig; 1 sliding on the supportng plate 6- and compressing spring 1L The motor will continue to move carrying the arm 9 with it until the lower end of the arm strikes the fixed bracket 12. By this time contact disc 11 will have bridged" the fi'xed contacts 202 Assoon: asthe' obstruction is removed spring 11 is strong enough to force the motor back'sothatthe plate strikes the stop 22 and the door continues to close until fully closed. The motor wi1'l,ot course, continue to exert a force so that the motor will again move to theleft until stopped'compressing spring 1-1.; Contacts will. again be bridged but produce no reversing; action 1 since just as the door completes its closing st'rokcand before contact. 17 bridgescontacts 20 the switch 86 Will have been moved by the door so-that contact .87 moves out from between. the hired contacts breaking the circuit which includes the: contacts 261 This operationzwi'll be described a little more in detailrinconnecti-omwith'Fig. 3. To open the doors switch 80 is closed. Current thenflowsthroughawire 89';sWitcl1:.-80, wire 81, wire 82 through the magnet valve and wire 84 to ground. The magcnt valveisenergized to permit the delivery'offluid pressure to the larger cylindertofi the motonl. The. door then: heg'ins toiop'en and continuesto open to fully opened position and remains-opened as long as'switch 8dis closed; Ais-soon-as switch 80 is opened the larger cylinder of motor 1 opens to exhaustand the door begins toclose. S ould it; strike antobstructioncont-act disc 17- will bridge contacts 20 as described above and current will flow through wire 89, wire 88, contact 87, wire 85, contact 20, contact disc 17,- contact 20,=wire 81:, wire 82, magnet valve 83, and to-ground-atSet. The door. will then begin toopenand continue to open until the obstruction is removed; It might be pointed out here that switch 86, of. course, moves as soon asthe door begins-to open to a position where contact 87 bridges the fixed contacts.

the like,

member adapted to be closed when the door connected to the motor strikes an obstruction and causes the motor to slide on its supporting means.

2. In an apparatus for, operating doors and the like, the combination comprising a motive device, means for slidably supporting the motor, a pair of fixed contacts, means for bridging the contacts supported by said motor for movement therewith, and means for resisting relative movement between the motor and its supporting means, said motor being adapted to slide 1 on its supporting means when the force exerted thereby exceeds a predetermined value.

3. In an apparatus for operating doors and the like, the combination comprising a fluid pressure motor adapted to be connected to the door to be operated, a support on which the motor is movably mounted, an electromagnetic valve for controlling the supply and exhaust of fluid pressure to said motor, circuits for said electro-magnetic valve including a manual switch, a door switch, and a switch adapted to be closed when the resistance to the movement of the motor causes it to move on its support whereby the magnetic valve is operated'to reverse the direction of movement of the motor.

4. In an apparatus for operating doors and pressure motor adapted to be connected to the door to be operated, a support on which the motor is movably mounted, an electro-magnetic valve for controlling the supply and exhaust of fluid pressure to said motor, circuits for said electro-magnetic valve including a manual switch, a door switch, and a switch adapted to be closed when the resistance to the operation of the motor causes it to move on its support whereby the magnetic valve is operated to reversethe direction of movement of the motor, said door switch being opened by the door at the end of its stroke.

5. In an apparatus for operating doors and the like, thecombination comprising a sup port, a motive device slidably mounted on the support, a switch mechanically connected to the motive device and havin a movable part cooperating with a relative y fixed part so that .when the motive device slides on its support the switch is closed, means for con-I trolling a supply of ener to said motive device, a manual switch an circuits, includthe combination comprising a fluid whereby the motive device is operated in one direction when the manual switch is closed and operated in the opposite direction when the movement of the motive device encounters a reacting force which causes it to slide on its support to close the switch connected to the motive device.

In testimony whereof I have hereunto set 1 my hand on this 5th da of June A. D. 1929.

ROSCgE D. CONKLIN.

ing said motive device, a switch connected to the motive device and said manual switch, 

